Boiler Quality Steel Sheet A516 Pressure Vessel Steel
We have listed the chemical and physical properties of the grades on the table below to allow for clear comparison. ASME SA 516 gr 70 has the highest tensile and yield strength of the three grades and this is due to the higher carbon content of the steel. The other principal alloying elements are the same as the other two ASME SA 516 grades.
Generally the higher the grade, in this case ASME SA 516 gr 70, the higher quality steel it is considered to be and the wider the range of possible applications. Our experience is that customers tend to choose either ASME SA 516 gr 60 or ASME SA 516 gr 70, with ASME SA 516 gr 65 being less popular. This is because the small difference between the grades mean that many heats of A516 70 can be dual or triple certified for all three grades and the small price differential means that for procurement purposes the additional cost of procuring ASME SA 516 gr 70 is small, whilst the engineering and logistical benefits can be significant.
ASME and ASTM Standards are harmonised so ASME SA 516 gr 70 is exactly the same as ASTM A 516 gr 70. On some specifications this is written as ASTM/ASME A/SA 516 gr70 or a similar combination of the same meaning.
A516 PRESSURE VESSEL STEEL CHEMICAL COMPOSITION
|Steel Grade||C||Si||Si (Min)||Mn||Mn (Min)||P||S|
ASTM A516 MECHANICAL PROPERTIES:
|A516 Grade 60||A 516 Grade 65||A516 Grade 70|
|Tensile Strength (ksi)||60-80||65-85||70-90|
|Tensile Strength (MPa)||415-550||450-585||485-620|
|Yield Strength (ksi)||32||35||38|
|Yield Strength (MPa)||220||240||260|
|Elongation in 200mm (%)||21||19||17|
|Elongation in 50mm (%)||25||23||21|
|Max Thickness (mm)||205||205||205|